A130418 Triangle (of n terms per row) where t(n,m) = the m-th positive integer which is coprime to n!.

1, 1, 3, 1, 5, 7, 1, 5, 7, 11, 1, 7, 11, 13, 17, 1, 7, 11, 13, 17, 19, 1, 11, 13, 17, 19, 23, 29, 1, 11, 13, 17, 19, 23, 29, 31, 1, 11, 13, 17, 19, 23, 29, 31, 37, 1, 11, 13, 17, 19, 23, 29, 31, 37, 41, 1, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 1, 13, 17, 19, 23, 29, 31, 37, 41, 43

Offset

1,3

Links

Table of n, a(n) for n=1..76.

Example

Triangle starts
.1
.1..3
.1..5..7
.1..5..7.11
.1..7.11.13.17
.1..7.11.13.17.19
.1.11.13.17.19.23.29
.1.11.13.17.19.23.29.31
.1.11.13.17.19.23.29.31.37
.1.11.13.17.19.23.29.31.37.41
.1.13.17.19.23.29.31.37.41.43.47
.1.13.17.19.23.29.31.37.41.43.47.53
.1.17.19.23.29.31.37.41.43.47.53.59.61
.1.17.19.23.29.31.37.41.43.47.53.59.61.67
.1.17.19.23.29.31.37.41.43.47.53.59.61.67.71

Crossrefs

Cf. A119992, A130419.

Sequence in context: A254344 A278032 A016600 * A038871 A209819 A193648

Adjacent sequences: A130415 A130416 A130417 * A130419 A130420 A130421

Keyword

nonn,tabl

Author

Leroy Quet, May 25 2007

Extensions

More terms from R. J. Mathar, Jun 15 2007

Status

approved